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Finding the Fourth Proportional to 31,993.92, 47,990.79 and 11,217.42

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Solution

The fourth proportional to 31,993.92, 47,990.79 and 11,217.42 is: 16,826.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,993.92 : 47,990.79 = 11,217.42 : x
  2. Step 2: Convert to fraction form
    31,993.92/47,990.79 = 11,217.42/x
  3. Step 3: Cross multiply
    31,993.92x = 47,990.79 × 11,217.42
  4. Step 4: Simplify right side
    31,993.92x = 538,332,847.56
  5. Step 5: Solve for x
    x = 538,332,847.56/31,993.92
  6. Step 6: Final answer
    x = 16,826.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.